منابع مشابه
Une généralisation automorphe des nombres de Stirling
Let [n] be theset {1,2, *.. , n> and CT a given permutation in S,, the symmetric group on [n]. The (unsigned) Stirling numbers of the first kind enumerate the permutations on En] with k cycles and those of the second kind give the number partitions of [n] having k blocks. In this paper we compute the number of permutations on [n] with k cycles and the number of partitions on [n] having k blocks...
متن کاملHiérarchies de généralisation dans les bases de données relationnelles : une approche hybride de rétro-conception
This paper proposes to combine a heuristic technique and an algorithmic one to provide a method to reverse engineer the generalization/specialization links hidden in a relational database. The heuristic phase combines the exploration of three sources: DDL specifications, DML specifications and data to provide information, such as inclusion links and existence constraints. This information is th...
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ژورنال
عنوان ژورنال: Bulletin of the Belgian Mathematical Society - Simon Stevin
سال: 1998
ISSN: 1370-1444
DOI: 10.36045/bbms/1103211558